MURATA OKR-T-10-W12

OKR-T/10-W12 Series
www.murata-ps.com
Adjustable Output 10-Amp SIP-mount DC/DC Converters
PRODUCT OVERVIEW
The OKR-T/10 series are SIP non-isolated Point-of-Load (PoL) DC/DC power converters measuring
only 0.41 x 0.65 x 0.3 inches (10.4 x 16.5 x 7.62 mm). The wide input range is 4.5 to 14 Volts DC. Based
on 600 KHz synchronous buck topology, the high power conversion efficient Point of Load (PoL) module
features programmable output voltage and On/Off control, under voltage lock out (UVLO), overcurrent and
over temperature protections. These units meet all standard UL/EN/ IEC 60950-1 safety certifications and
RoHS-6 hazardous substance compliance.
Typical unit
FEATURES
EATURES
„
600 KHz operation
„
4.5-14 Vdc input voltage range
Contents
Description, Connection Diagram, Photograph
Ordering Guide, Model Numbering, Product Label
Mechanical Specifications, Input/Output Pinout
Detailed Electrical Specifications
Trim Connections, Soldering Guidelines
Application Notes
Performance Data
„
Programmable output voltage from 0.591-6.0 VDC
„
Drives up to 200 μF ceramic capacitive loads
„
High power conversion efficiency at 92%
„
Outstanding thermal derating performance
„
Over temperature and over current protection
„
On/Off control
Page
1
2
3
4
5
6
8
„
SIP, 0.41 x 0.65 x 0.3 inches (10.4 x 16.5 x 7.62 mm).
„
Meets UL/EN/IEC 60950-1 safety certification
„
RoHS-6 hazardous substance compliance
Figure 1. Simplified Block Diagram
+Vin
F1
On/Off
Control
+Vout
t4XJUDIJOH
Controller
t'JMUFST
t$VSSFOU4FOTF
External
DC
Power
Source
Trim
Open = On
Closed = Off
(Positive
On/Off)
Reference and
Error Amplifier
Common
Common
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com
MDC_14 Jan 2010
email: [email protected]
MDC_OKR-T/10-W12 Series.A02_long Page 1 of 9
OKR-T/10-W12 Series
Adjustable Output 10-Amp SIP-mount DC/DC Converters
Performance Specifications and Ordering Guide
ORDERING GUIDE
Output
Root Model
Input
R/N (mVp-p) Regulation (Max.)
IOUT
VOUT (Amps Power
VIN Nom. Range
(Volts) max) (Watts)
Max.
Line
Load
(Volts) (Volts)
OKR-T/10-W12-C 0.591-6
10
50
30
±0.3%
±0.75%
12
➀ Dimensions are in inches (mm).
Package
IIN,
IIN,
no load full load
(mA)
(Amps)
4.5-14
80
4.53
Efficiency
Min.
Typ.
Case
Pinout
90.5%
92%
C90
P73
otherwise noted. Output capacitors are 1 μF ceramic and| 10 μF electrolytic in parallel.
Input cap is 22 μF. See detailed specifications. I/O caps are necessary for our test equipment and may not be needed for your application.
➁ Ripple and Noise is shown at Vout=1V. See specs for details.
➂ All specifications are at nominal line voltage, Vout= 5V and full load, +25 deg.C. unless
f Vin must be 2V or higher than Vout for 3.3 to 5V outputs.
PART NUMBER STRUCTURE
OK R - T / 10 - W12
Okami Non-isolated PoL
E-C
RoHS Hazardous
Substance Compliance
C = RoHS-6 (does not claim EU RoHS exemption 7b–lead in solder)
SIP-Mount
Forced On/Off Control
Blank = Standard on/off, open pin = ON
E = Forced enable, open pin = OFF, see specs
Output Voltage Range
T = Trimmable, 0.591-6 Volts
Wide Input Voltage Range
W12 = 4.5 – 14 Volts
Note: Some model number combinations
may not be available. Contact Murata
Power Solutions for availability.
Maximum Rated Output
Current in Amps
Product Label
Because of the small size of these products, the product label contains a
character-reduced code to indicate the model number and manufacturing date
code. Not all items on the label are always used. Please note that the label differs from the product photograph on page 1. Here is the layout of the label:
Model Number
Product Code
OKR-T/10-W12-C
R01110
OKR-T/10-W12E-C
R01110E
The manufacturing date code is four characters:
Mfg.
date
code
XXXXXX
Product code
YMDX Rev.
Revision level
Figure 2. Label Artwork Layout
First character – Last digit of manufacturing year, example 2009
Second character – Month code (1 through 9 and O through D)
Third character – Day code (1 through 9 = 1 to 9, 10 = O and
11 through 31 = A through Z)
Fourth character – Manufacturing information
The label contains three rows of information:
First row – Murata Power Solutions logo
Second row – Model number product code (see table)
Third row – Manufacturing date code and revision level
www.murata-ps.com
MDC_14 Jan 2010
email: [email protected]
MDC_OKR-T/10-W12 Series.A02_long Page 2 of 9
OKR-T/10-W12 Series
Adjustable Output 10-Amp SIP-mount DC/DC Converters
MECHANICAL SPECIFICATIONS
0.30
(7.62)
0.41 (10.4)
CL
0.22
(5.6)
0.20
(5.1)
0.205
(5.2)
0.05
(1.3)
REF
THK
0.12
(3.05)
0.05
(1.3)
REF
THK
0.65 (16.5)
Pin #1
0.15 (3.8)
0.15 (3.8)
Pin #5
0.067 (1.7)
0.032
(0.81)
0.032
(0.81)
0.134 (3.4)
0.05 (1.3)
0.067 (1.7)
0.134 (3.4)
0.05 (1.3)
OKR-T/6
Pin #1
OKR-T/10
OKR-T/3
Case C90
Case C72
Pin diameter: 0.032 (0.81)
Tolerance: ±0.002 (±0.05)
Pin material: Copper alloy
Pin finish: Pure matte tin 100-300 μin.
over 75-100 μin. nickel
INPUT/OUTPUT CONNECTIONS
OKR-T-W12
Pin
1
2
3
4
5
Figure 2. OKR Series
Component locations are typical.
Dimensions are in inches (mm shown for ref. only).
Third Angle Projection
Function P73
Remote On/Off Control
+VIN
Ground
+VOUT
Output Trim
Tolerances (unless otherwise specified):
.XX ± 0.02 (0.5)
.XXX ± 0.010 (0.25)
Angles ± 2˚
Components are shown for reference only.
www.murata-ps.com
MDC_14 Jan 2010
email: [email protected]
MDC_OKR-T/10-W12 Series.A02_long Page 3 of 9
OKR-T/10-W12 Series
Adjustable Output 10-Amp SIP-mount DC/DC Converters
Performance/Functional Specifications
All specifications are typical unless noted See Note 1.
Input
Dynamic Characteristics
Dynamic Load Response (50 to 100% load step, no external caps)
di/dt = 5 A/μSec
40 μSec to within ±2% of final value
Peak Deviation
300 mV
Input Voltage Range
See Ordering Guide
Recommended External Fuse
20 Amps
Reverse Polarity Protection (Note 9)
None. Use an external fuse.
Isolation
Not isolated. The input and output
commons are internally connected.
Start-Up Voltage
4.2 Volts
Undervoltage Shutdown
3.4 Volts
Reflected (Back) Ripple Current (Note 2) 20 mA pk-pk
Internal Input Filter Type
Input Current:
See Ordering Guide
Inrush Transient
0.4 A2Sec.
Shutdown Mode (Off, UV, OT)
5 mA
Output Short Circuit
60 mA
No Load, 5V out
80 mA
Low Line (Vin=Vmin, 5Vout)
Remote On/Off Control (Note 5)
Positive Logic
Current
Remote On/Off Control
Positive Logic
Current
Turn-on Time:
Vin on to Vout regulated
Remote On to Vout regulated
-40 to +85 °C., See derating curves
Storage Temperature Range
-55 to +125 °C.
Thermal Protection/Shutdown
+120 °C.
Relative Humidity
to 85%/+85 °C.
Restriction of Hazardous Substances
RoHS-6 (does not claim EU RoHS exemption
7b–lead in solder)
Outline Dimensions
See Mechanical Specifications
Weight
0.07 ounces (2 grams)
Safety
Meets UL/cUL 60950-1
CSA-C22.2 No. 60950-1
IEC/EN 60950-1
[“E” version]
ON = +2 V. to +Vin max.,
49KΩ pulldown to ground
OFF = open pin or –0.3 to +0.4 V. max.
1 mA max.
6 mSec
6 mSec
No minimum load
0 to 10 Amps
Accuracy (50% load, no trim)
±2 % of Vnom
Temperature Coefficient
±0.02% per °C. of Vout range
Ripple/Noise (20 MHz bandwidth)
See Ordering Guide and note 14
Line/Load Regulation
See Ordering Guide and note 10
Efficiency
See Ordering Guide and performance
graphs
Overvoltage protection
TBD
Operating Temperature Range
7.6 Amps
Output Current Range
(to rated specifications)
Short Circuit Mode (Notes 6, 12)
Short Circuit Current Output
Protection Method
removal. (Note 8)
Short Circuit Duration
(output shorted to ground)
Calculated MTBF (Note 4)
[Standard version]
ON = +1.5 V. to +Vin max. or open pin
OFF = –0.3 to +0.4 V. max. or ground pin
1 mA
Output
Current Limit Inception
(98% of Vout setting, after warm up)
Environmental
Physical
Minimum Loading
Maximum Capacitive Loading
Cap-ESR=0.001 to 0.015 Ohms
Cap-ESR >0.015 Ohms
600 KHz
Operating PC Board Range, no derating -40 to +100 °C.
Capacitive
Full Load Conditions
Switching Frequency
Absolute Maximum Ratings
Input Voltage
Continuous or transient
15 Volts max.
Output Power
50 Watts max. (OKR-T/10-W12)
On/Off Control
0 Volts. min. to +Vin. max.
Input Reverse Polarity Protection
See Fuse section
Output Current
Current-limited. Devices can withstand
sustained short circuit without damage.
Storage Temperature
-40 to +125 deg. C.
Absolute maximums are stress ratings. Exposure of devices to greater than any of these
conditions may adversely affect long-term reliability. Proper operation under conditions
other than those listed in the Performance/Functional Specifications Table is not implied or
recommended.
CAUTION: This product is not internally fused. To comply with safety agency certifications
and to avoid injury to personnel or equipment, the user must supply an external fast-blow
fuse to the input terminals.
200 μF
1000 μF
19 Amps
0.6 Amp
Hiccup autorecovery upon overload
Continuous, no damage
None
www.murata-ps.com
MDC_14 Jan 2010
email: [email protected]
MDC_OKR-T/10-W12 Series.A02_long Page 4 of 9
OKR-T/10-W12 Series
Adjustable Output 10-Amp SIP-mount DC/DC Converters
Notes
(1) All specifications are typical unless noted. General conditions for Specifications are +25
deg.C, Vin=nominal, Vout=nominal (no trim installed), full rated load. Adequate airflow
must be supplied for extended testing under power.
All models are tested and specified with external 1μF and 10 μF paralleled output capacitors and a 22 μF external input capacitor. All capacitors are low ESR types. Caps are
layout dependent These capacitors are necessary to accommodate our test equipment
and may not be required in your applications. All models are stable and regulate within
spec under no-load conditions.
(2) Input Back Ripple Current is tested and specified over a 5 Hz to 20 MHz bandwidth. Input
filtering is Cin=2 x 100 μF, 100V tantalum, Cbus=1000 μF, 100V electrolytic, Lbus=1 μH.
All caps are low ESR types.
(3) Note that Maximum Power Derating curves indicate an average current at nominal input
voltage. At higher temperatures and/or lower airflow, the DC/DC converter will tolerate
brief full current outputs if the total RMS current over time does not exceed the Derating
curve. All Derating curves are presented at sea level altitude. Be aware of reduced power
dissipation with increasing altitude.
(4a) Mean Time Before Failure is calculated using the Telcordia (Belcore) SR-332 Method 1,
Case 3, ground fixed conditions, Tpcboard=+25 ˚C, full output load, natural air convection.
(4b) Mean Time Before Failure is calculated using the MIL-HDBK-217N2 method, ground
benign, +25ºC., full output load, natural convection.
(5) The On/Off Control is normally controlled by a switch or open collector or open drain transistor. But it may also be driven with external logic or by applying appropriate external
voltages which are referenced to Input Common.
(6) Short circuit shutdown begins when the output voltage degrades approximately 2% from
the selected setting.
(8) “Hiccup” overcurrent operation repeatedly attempts to restart the converter with a brief,
full-current output. If the overcurrent condition still exists, the restart current will be
removed and then tried again. This short current pulse prevents overheating and damaging the converter. Once the fault is removed, the converter immediately recovers normal
operation.
(9) Input Fusing: If reverse polarity is accidentally applied to the input, to ensure reverse
input protection with full output load, always connect an external input fast-blow fuse
in series with the +Vin input. Use approximately twice the full input current rating with
nominal input voltage.
(10) Regulation specifications describe the deviation as the line input voltage or output load
current is varied from a nominal midpoint value to either extreme.
(11) CAUTION: Since the converter is mounted on the end by its pins, do not subject it to high
vibration, shock or acceleration.
(12) Output current limit and short circuit protection is non-latching. When the overcurrent
fault is removed, the converter will immediately recover.
(13) Do not exceed maximum power specifications when adjusting the output trim. All published specifications are listed at rated nominal output current using published Derating
curves. The maximum power specifications indicate brief operation before overcurrent
shutdown occurs. Note particularly that current must be limited at higher output voltage
in order to comply with maximum power requirements.
(14) At zero output current, the output may contain low frequency components which exceed
the ripple specification. The output may be operated indefinitely with no load.
(15) The input and output are not isolated. They share a single COMMON power and signal
return.
(16) Vin must be 2V or higher than Vout for 3.3 to 6V outputs: Vin >= (2V + Vout)
(7) The outputs are not intended to sink appreciable reverse current.
Trim Connections
+VOUT
RTRIM
Trim
RLOAD
Ground
RTRIM (kΩ) =
1.182
VOUT − 0.591
Soldering Guidelines
Murata Power Solutions recommends the specifications below when installing these converters. These specifications vary depending on the solder type. Exceeding these specifications may cause damage to the product. Your production environment may differ; therefore please thoroughly review these guidelines with your process engineers.
Wave Solder Operations for through-hole mounted products (THMT)
For Sn/Ag/Cu based solders:
For Sn/Pb based solders:
Maximum Preheat Temperature
115° C.
Maximum Preheat Temperature
105° C.
Maximum Pot Temperature
270° C.
Maximum Pot Temperature
250° C.
Maximum Solder Dwell Time
7 seconds
Maximum Solder Dwell Time
6 seconds
www.murata-ps.com
MDC_14 Jan 2010
email: [email protected]
MDC_OKR-T/10-W12 Series.A02_long Page 5 of 9
OKR-T/10-W12 Series
Adjustable Output 10-Amp SIP-mount DC/DC Converters
APPLICATION NOTES
Input Fusing
Certain applications and/or safety agencies may require fuses at the inputs of
power conversion components. Fuses should also be used when there is the
possibility of sustained input voltage reversal which is not current-limited. For
greatest safely, we recommend a fast blow fuse installed in the ungrounded
input supply line.
The installer must observe all relevant safety standards and regulations. For
safety agency approvals, install the converter in compliance with the end-user
safety standard, i.e. IEC/EN/UL 60950-1.
Input Under-Voltage Shutdown and Start-Up Threshold
Under normal start-up conditions, converters will not begin to regulate properly
until the ramping-up input voltage exceeds and remains at the Start-Up
Threshold Voltage (see Specifications). Once operating, converters will not
turn off until the input voltage drops below the Under-Voltage Shutdown Limit.
Subsequent restart will not occur until the input voltage rises again above the
Start-Up Threshold. This built-in hysteresis prevents any unstable on/off operation at a single input voltage.
Users should be aware however of input sources near the Under-Voltage
Shutdown whose voltage decays as input current is consumed (such as
capacitor inputs), the converter shuts off and then restarts as the external
capacitor recharges. Such situations could oscillate. To prevent this, make
sure the operating input voltage is well above the UV Shutdown voltage AT ALL
TIMES.
Start-Up Time
Assuming that the output current is set at the rated maximum, the Vin to Vout
Start-Up Time (see Specifications) is the time interval between the point when
the ramping input voltage crosses the Start-Up Threshold and the fully loaded
regulated output voltage enters and remains within its specified accuracy band.
Actual measured times will vary with input source impedance, external input
capacitance, input voltage slew rate and final value of the input voltage as it
appears at the converter.
These converters include a soft start circuit to moderate the duty cycle of its
PWM controller at power up, thereby limiting the input inrush current.
The On/Off Remote Control interval from On command to Vout regulated
assumes that the converter already has its input voltage stabilized above the
Start-Up Threshold before the On command. The interval is measured from the
On command until the output enters and remains within its specified accuracy
band. The specification assumes that the output is fully loaded at maximum
rated current. Similar conditions apply to the On to Vout regulated specification
such as external load capacitance and soft start circuitry.
Recommended Input Filtering
The user must assure that the input source has low AC impedance to provide
dynamic stability and that the input supply has little or no inductive content,
including long distributed wiring to a remote power supply. The converter will
operate with no additional external capacitance if these conditions are met.
For best performance, we recommend installing a low-ESR capacitor
immediately adjacent to the converter’s input terminals. The capacitor should
be a ceramic type such as the Murata GRM32 series or a polymer type. Initial
suggested capacitor values are 10 to 22 μF, rated at twice the expected maximum input voltage. Make sure that the input terminals do not go below the
undervoltage shutdown voltage at all times. More input bulk capacitance may
be added in parallel (either electrolytic or tantalum) if needed.
Recommended Output Filtering
The converter will achieve its rated output ripple and noise with no additional
external capacitor. However, the user may install more external output capacitance to reduce the ripple even further or for improved dynamic response.
Again, use low-ESR ceramic (Murata GRM32 series) or polymer capacitors.
Initial values of 10 to 47 μF may be tried, either single or multiple capacitors in
parallel. Mount these close to the converter. Measure the output ripple under
your load conditions.
Use only as much capacitance as required to achieve your ripple and noise
objectives. Excessive capacitance can make step load recovery sluggish or
possibly introduce instability. Do not exceed the maximum rated output capacitance listed in the specifications.
Input Ripple Current and Output Noise
All models in this converter series are tested and specified for input reflected
ripple current and output noise using designated external input/output components, circuits and layout as shown in the figures below. In the figure below,
the Cbus and Lbus components simulate a typical DC voltage bus. Please
note that the values of Cin, Lbus and Cbus will vary according to the specific
converter model.
TO
OSCILLOSCOPE
CURRENT
PROBE
+INPUT
VIN
LBUS
+
–
+
–
CBUS
CIN
-INPUT
CIN = 2 x 100μF, ESR < 700mΩ @ 100kHz
CBUS = 1000μF, ESR < 100mΩ @ 100kHz
LBUS = 1μH
Figure 4: Measuring Input Ripple Current
In the figure below, the two copper strips simulate real-world printed circuit
impedances between the power supply and its load. In order to minimize circuit
errors and standardize tests between units, scope measurements should be
made using BNC connectors or the probe ground should not exceed one half
inch and soldered directly to the test circuit.
www.murata-ps.com
MDC_14 Jan 2010
email: [email protected]
MDC_OKR-T/10-W12 Series.A02_long Page 6 of 9
OKR-T/10-W12 Series
Adjustable Output 10-Amp SIP-mount DC/DC Converters
CAUTION: If you routinely or accidentally exceed these Derating guidelines,
the converter may have an unplanned Over Temperature shut down. Also, these
graphs are all collected at slightly above Sea Level altitude. Be sure to reduce
the derating for higher density altitude.
COPPER STRIP
+OUTPUT
C1
C2
SCOPE
RLOAD
-OUTPUT
COPPER STRIP
C1 = 0.1μF CERAMIC
C2 = 10μF TANTALUM
LOAD 2-3 INCHES (51-76mm) FROM MODULE
Figure 5: Measuring Output Ripple and Noise (PARD)
Minimum Output Loading Requirements
All models regulate within specification and are stable under no load to full
load conditions. Operation under no load might however slightly increase
output ripple and noise.
Thermal Shutdown
To prevent many over temperature problems and damage, these converters
include thermal shutdown circuitry. If environmental conditions cause the
temperature of the DC/DC’s to rise above the Operating Temperature Range
up to the shutdown temperature, an on-board electronic temperature sensor
will power down the unit. When the temperature decreases below the turn-on
threshold, the converter will automatically restart. There is a small amount of
hysteresis to prevent rapid on/off cycling. The temperature sensor is typically
located adjacent to the switching controller, approximately in the center of the
unit. See the Performance and Functional Specifications.
Output Current Limiting
Current limiting inception is defined as the point at which full power falls below
the rated tolerance. See the Performance/Functional Specifications. Note particularly that the output current may briefly rise above its rated value in normal
operation as long as the average output power is not exceeded. This enhances
reliability and continued operation of your application. If the output current is
too high, the converter will enter the short circuit condition.
Output Short Circuit Condition
When a converter is in current-limit mode, the output voltage will drop as the
output current demand increases. If the output voltage drops too low (approximately 98% of nominal output voltage for most models), the magnetically
coupled voltage used to develop primary side voltages will also drop, thereby
shutting down the PWM controller. Following a time-out period, the PWM will
restart, causing the output voltage to begin ramping up to its appropriate value.
If the short-circuit condition persists, another shutdown cycle will initiate. This
rapid on/off cycling is called “hiccup mode”. The hiccup cycling reduces the
average output current, thereby preventing excessive internal temperatures
and/or component damage. A short circuit can be tolerated indefinitely.
The “hiccup” system differs from older latching short circuit systems
because you do not have to power down the converter to make it restart. The
system will automatically restore operation as soon as the short circuit condition is removed.
Remote On/Off Control
Please refer to the Connection Diagram on page 1 for On/Off connections.
CAUTION: If you operate too close to the thermal limits, the converter may
shut down suddenly without warning. Be sure to thoroughly test your application to avoid unplanned thermal shutdown.
Positive polarity models are enabled when the On/Off pin is left open or is
pulled high to +Vin with respect to –Vin. Positive-polarity devices are disabled
when the On/Off is grounded or brought to within a low voltage (see Specifications) with respect to –Vin.
Temperature Derating Curves
The graphs in the next section illustrate typical operation under a variety of
conditions. The Derating curves show the maximum continuous ambient air
temperature and decreasing maximum output current which is acceptable
under increasing forced airflow measured in Linear Feet per Minute (“LFM”).
Note that these are AVERAGE measurements. The converter will accept brief
increases in current or reduced airflow as long as the average is not exceeded.
Dynamic control of the On/Off function should be able to sink appropriate
signal current when brought low and withstand appropriate voltage when
brought high. Be aware too that there is a finite time in milliseconds (see
Specifications) between the time of On/Off Control activation and stable,
regulated output. This time will vary slightly with output load type and current
and input conditions.
Note that the temperatures are of the ambient airflow, not the converter
itself which is obviously running at higher temperature than the outside air.
Also note that very low flow rates (below about 25 LFM) are similar to “natural
convection”, that is, not using fan-forced airflow.
Murata Power Solutions makes Characterization measurements in a closed
cycle wind tunnel with calibrated airflow. We use both thermocouples and an
infrared camera system to observe thermal performance.
Output Capacitive Load
These converters do not require external capacitance added to achieve rated
specifications. Users should only consider adding capacitance to reduce
switching noise and/or to handle spike current load steps. Install only enough
capacitance to achieve noise objectives. Excess external capacitance may
cause regulation problems, degraded transient response and possible oscillation or instability.
www.murata-ps.com
MDC_14 Jan 2010
email: [email protected]
MDC_OKR-T/10-W12 Series.A02_long Page 7 of 9
OKR-T/10-W12 Series
Adjustable Output 10-Amp SIP-mount DC/DC Converters
PERFORMANCE DATA
Efficiency vs. Line Voltage and Load Current @ +25°C
(VOUT = 6V)
Efficiency vs. Line Voltage and Load Current @ +25°C
(VOUT = 3.3V)
100
100
95
95
90
Efficiency (%)
Efficiency (%)
90
VIN = 8V
VIN = 12V
VIN = 14V
85
80
75
VIN = 5.3V
VIN = 12V
VIN = 14V
85
80
75
70
70
65
60
65
0
2
4
6
Load Curre nt (Amps)
8
0
10
2
Efficiency vs. Line Voltage and Load Current @ +25°C
(VOUT = 1.5V)
4
6
Load Curre nt (Amps)
8
10
Efficiency vs. Line Voltage and Load Current @ +25°C
(VOUT = 1V)
100
90
85
80
75
80
Efficiency (%)
Efficiency (%)
90
VIN = 4.5V
VIN = 12V
VIN = 14V
70
60
VIN = 4.5V
VIN = 12V
VIN = 14V
70
65
60
55
50
50
45
40
40
0
2
4
6
Load Curre nt (Amps)
8
10
0
2
www.murata-ps.com
MDC_14 Jan 2010
4
6
Load Curre nt (Amps)
8
10
email: [email protected]
MDC_OKR-T/10-W12 Series.A02_long Page 8 of 9
OKR-T/10-W12 Series
Adjustable Output 10-Amp SIP-mount DC/DC Converters
PERFORMANCE DATA
Maximum Current Temperature Derating at Sea Level
(VIN= 12V, VOUT = 2.5V)
12
12
11
11
10
10
Output Current (Amps)
Output Current (Amps)
Maximum Current Temperature Derating at Sea Level
(VIN= 12V, VOUT = 6V).
9
8
100
200
300
400
7
6
LFM
LFM
LFM
LFM
9
Natural convection
100 LFM
200 LFM
300 LFM
400 LFM
8
7
6
5
5
4
4
3
3
2
2
20
25
30
35
40
45
50
55
60
65
70
75
80
85
20
25
30
35
40
Ambient Temperature (ºC)
45
50
55
60
65
70
75
80
85
Ambient Temperature (ºC)
Maximum Current Temperature Derating at Sea Level
(VIN= 12V, VOUT = 1V).
12
11
Output Current (Amps)
10
9
Natural convection
100 LFM
200 LFM
300 LFM
400 LFM
8
7
6
5
4
3
2
1
6
11
16
21
26
31
36
41
46
51
56
61
66
Ambient Temperature (ºC)
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other
technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply
the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without
notice.
© 2010 Murata Power Solutions, Inc.
www.murata-ps.com/locations
MDC_14 Jan 2010
email: [email protected]
MDC_OKR-T/10-W12 Series.A02_long Page 9 of 9